title: [The border seal in restorations of class-V lesions with glass ionomer cement and composite (the sandwich filling)].
abstract: In 9 patients, 60 class V restorations were evaluated clinically and by scanning electron microscopy. All lesions were treated with glass-ionomer combined with composite resin. In 27 fillings (group A) the glass-ionomer lining cement was etched, whereas in 33 fillings (group B) the composite material was applied directly on the unetched glass-ionomer liner. Clinically, the retention of the fillings after one year was 100%. The margins of the fillings were checked with different explorers and found to be acceptable. Scanning electron microscopy of the margins of the fillings showed disappointing results. One week after placement of the fillings, only 16.2% (group A) and 7.4% (group B) of the cervical margins in dentin were rated perfect. After one year, even more cervical bond failures were observed. 9.7% perfect margins were found in group A, 3.2% in group B. Etching of the glass-ionomer liner had no influence on the cervical bond failure of the class V fillings.
authors.affiliation: Abteilung für Kariologie und Parodontologie, Universität Basel.
authors.forename: D
authors.initials: D
authors.lastname: Hänggi
authors.forename: A F
authors.initials: AF
authors.lastname: Hefti
authors.forename: K H
authors.initials: KH
authors.lastname: Rateitschak
mesh_terms: D000134:Acid Etching, Dental; D003188:Composite Resins / Q000627:therapeutic use*; D003731:Dental Caries / Q000628:therapy*; D003737:Dental Cavity Preparation / Q000379:methods; D003738:Dental Cements; D003793:Dental Restoration, Permanent / Q000379:methods*; D005069:Evaluation Studies as Topic; D005260:Female; D005899:Glass Ionomer Cements; D006801:Humans; D008297:Male
chemical_list: D003188:Composite Resins; D003738:Dental Cements; D005899:Glass Ionomer Cements
vernacular_title: Randschluss bei Restaurationen von Klasse-V-Läsionen mit Glasionomerzement und Komposit (Sandwich-Füllung).